Coupling or clamping device for scaffolding and other framework structures



June 7 1927. l Y

D. PALMER-JONES COUPLING OR CLAMPING DEVICE FCR SCAF AND OTHER FRAMEWORK STRUCTURES Filed sept. 16, 192e l l d 1,631,831 June 7 1927' D. PALMER-JONES GOUPLING OR CLAMPINGDEVICE FOR SCAFFOLDING AND OTHER FRAMEWORK STRUCTURES Filed Sept. 16, 1926 2 Sheets-Sheet 2 PatentedI .June i 7, 1927.

UNITED'. Vsrqrrz's "PATENT oFF'lcE.

DANIEL PALERJ ONES, OF AS'JLOCIKZELL, LONDON, ENGLAND, .ASSIGNOR OF ONE-HALF STRUCTURES.

- I TO SCAFFOLDINGKGREAT BRITAIN) LIMITED, OF STOCXWELL. LONDON, ENGLAND.

SCAFFOLDING -AND OTHER FRAMEWORK.

Application led September 16, 1926, Serial No. 135,714,` and in Great Britain October 20, 1925.

The presentinvention refers to improvements `in devices for coupling or clampin together tubular and other members of sca folding `and other framework structures, such as the tubular metal framework of buildings, and the devices hereafter dealt with are particularly applicable for Acoupling or clamping together tubular or other members which are cylindrical in cross secplanes, or Ab tion. l

In all of such couplingl devices it is of course essential that by their employment the members clamped, hereafter termed in this specification scaffolding members, shall be firmly and securely held in the desired relation to each other, whether the members areV parallel to each other or at any angle to each other, whilst at the same time it is essential that the coupling devices shall be of extremely simple construction and consist of few parts so that theyv can be manufactured cheaply and utilized effectively by practically unskilled labour.

Now the object of the present invention is to provide a device, which shall not only fulfill the foregoing requirements, but which also shall enable two scaffolding members to be coupled together with their axes in parallel planes at such a distance apart that one of such scaffolding members can be placed with its axis at any desired angle to the other scaffolding member in their respective which, by merelychanging one of the. ttings of the device hereafter described, two scaffolding -members can be A clamped with their axes parallely to each other and in the same plane, .while at the same time one or-two scaffolding members can be clamped by the same device with their axes in a parallel plane but with their y said axes at any desired angle to .the axis Vor axes of the otherscaifo'ldmg member or members first mentioned. v

The invention further -provides that the same clamping device can be first fixedl to a scaffolding member or to two arallel scaffolding members, and then a urther scaffolding member or two scaffolding members can be placed in the coupling device and clamped at any angle4 or parallel to the first mentioned scaffolding member or members,

those scaffolding members in position, so

that, for instance, the coupling device can be fixed to two parallel vertical scaffolding .members and hold the latter together, and then a diagonal scaffolding member or two arallel diagonal scaffolding members can e applied and coupled atany angle to the first mentioned vertical scaffolding member or members for bracing purposes.

The invention will be described with reference to the accompanying drawings, where- Fig'. 1 is a side elevation of one construction of the mventlon.

2 is a sectional side elevation of a. y modified construction, and Fig. 3 is an endview of the disc detached, hereafter described.

Fig. 4 is. a perspective view showing the under side of a gripping .jaw (detached) constructed for gripping a single scaffolding member.

' Fig. 5 is a side elevation showing a modiication bf the device shown in Fig. 1 and 4 Fig. 6 is a perspective view showing the under side of a gripping jaw constructed for gripping two lpairs of 'parallel scaffolding kmembers.

Referring to Fig. 1 of the drawings, thev i square, or polygonal, or other shape desired.

The base of each stem 2, 3 conjoining the face ofthe disc is of curved formation, as at 4, having a radius correspondingto the cross section ,of the cylindrical scaffolding members which are to be clamped, and in the construction shown at Fi l, the ends of the stems are screwthreade.

At Fig. 1 two .scaffolding members 5, 6

' are shown clamped with their axes at right angles to each other, the scaffolding members illustrated being of metal, circular in cross section and tubular, although the invention is not limited to the construction of the scaffolding members, which might be solid and of other material than metal.

For each stem a gripping jaw is provided, Such as the jaws 7 8, an example of which is illustrated in perspective 'at Fig. 4, and

- the jaws are passed over the stems, the stems passing through a hole such as 9, illustrated in dotted lines at Fig. 4, so that when puts such as 10 are screwed against the jaws 7, 8, the latter will be forced on to the scaffolding members 5, 6 and-grip the same.

- Such jaws 7, 8 for gripping single members are constructed with a gripping sur- 4face 11 (Fig. l) which conforms to the cross section of the scaffolding members, such as 5, 6, which are to be gripped, and preferably each ljaw for gripping a single member upon one side of the steml is constructed with an extension 12 upon the opposite side of the stem, which extension isv constructed as shown to take a bearing'on the face of the disc 1, but it is to be. understood that in some `cases the extension 12 may be dispensed with although it is considered advantageous to construct thel device' with-such an extension.

In utilizing such a clampin device the body of the coupling member 1s a plied to the scaffoldin such' as 5, so that t e cylindrical scaol 'ng member contacts with the disc 1 incline contact and also contacts, likewlse in lmecontact, with the curved base of the stem 2. The jaw 7 isthen threaded over the endof the stem 2 so that thef gripping `surface 11 of the jaw 7 bears on the scaffoldlng member 5 and fits-partly around it,

.- while the extension 12 of the jaw 7 bears device, and the latterv is itself supporte the jaw-8 is then threaded over the stem`3 l scaffolding member' 5 or at any other angle in a plane parallel. withl the plane containing the axis .of the scaffolding member 5, .is

then applied to the body of thecouplmgl member so that'the scalolding memberA 6 contacts with the -disc 1j andalso` is inline contact w1th the fcurved base of the stem 3;

so that the grippingl surfacell ofl the jaw bears and .partly embracesl the'scaifolding t member l6, and -the'extens'ion 12'bears onthe the stem of such a construction as, at Fig. 1

\ Such a device can, as illustrated, be' emi disc 1. A nut 1() is vthen screwed onto the screwthreaded end of the stem 3 and the necessary pressure applied thereby to the gripping. jaw 8, so that the scaffolding member 6 is firmly held.

Obviously in such a 'construction one of the scafolding membersl may be located either parallel to, or at any angle to the other scaffolding member, the axes of the Scaffolding members being always in planes parallel to each other.

For instance, if a scaffolding member 6 is vertical, `a scaffolding member 5 can be clamped thereto with its axis diagonal so as to form, for instance. a bracing member \80 between two vertical scaffolding members.

In a modified construction, as shown at Fig. 2, there is a screwthreaded axial boring 1x through the stems 2, 3', and bolts 18 pass through the gripping jaws 7, 8 and en- 85 gage in the screwthreaded axial boring, so that the jaws can be forced on to the scaffolding members, it being arranged thatl when the two scaffolding members are clamped theoends of the bolts 13 do not meet 90 within the boring of the stems.

In the drawing the edge of the extension 12 of each gripping jaw 'is curved, see Fig.

4,' to conform with the curvature of the disc 1, and the faces of the disc are formed with teeth or serrations 14 l(Fig. 3) adapted to engage with teeth or serrations formed in the edge of the extension 12.

At Fig. 4 a perspective view of a gripping jaw such'as the gripping jaws 7 8,`is illustrated, ,where the jaw is flanged lsoas to provide two curved gripping edges- 11 which conform with the scaifolding member to be clamped, and this perspective view also illustrates the extension 12.

At Fig. 5 an example is shown of a clamping device according to this invention, similar to Fig. 2 but in which each gripping jaw 15, 16 extends laterally of the stems for a suitable distance to overhan members to be clamped, this construction lllustrated being suitable for clamping together two parallel scalolding members 17, 18, and also for clamping together two parallel sca'olding members 19, 20 with their axes at any agglo to the axes of the scaiolding members 1 18.

gripping jaw, such as 15 or 16, is shown bythe perspective view Fig. 6, from which and from Fig. 5 it will beobserv'ed that the jaw, such as 15 Fig. 6, is formed with a hole 21 indicated by dotted lines, through which Zthe bolt 13 passes, or which is .passed over this jaw 15 overhangsA the members to be 'clamped and the jaw being flanged,r the'over-` hanging flanges are formed with curvedv faces 22 to suit the curvature of the scaifolding members to. be clamped.

upon one face of the disc l and a singley scaffolding member can be clamped upon the opposite face by utilizing a jaw such as is described at Fig. 4.

What I' claim as my invention and desire to, secure by Letters Patent is zl. A device for. clamping togethervtubu;

Alar and other members of scaffolding or framework structures; comprising a disc having two coaxial stems one proceeding from each face thereof, the base of each stem conjoining the face ofthe disc in curved formation with a radius corresponding to the cross section of the scaiolding members which are to be clamped, gripping jaws one to be applied to each stem, said jaws extending laterally of said stems to overhang the scaffolding members contacting with the curved bases of said stems and located between said griping jaws and said disc, said jaws being formed at their ends to partly embrace said scaolding members to be clamped, and means coacting between said stems and said jaws to force said jaws to grip said scaffolding members between said jaws and said central disc, A

2. A device for clamping together tubular and other members of scaii'olding or frameworkfstructures; comprising a disc having two coaxial stems one proceeding from each face thereof, the base'of each stemv conjoining said disc in curved formation with a radius corresponding to the cross section of the scaii'olding members which are to be clamped, said stems having a through axial boring screwthreaded internally, two gripping jaws to be applied to said stems each of said jaws having a hole Y for the free passage of a clamping bolt, said jaws extending laterally of said vstems to overhang `the* scaolding `members located between saidl jaws and said disc andA contacting with the curved bases of said stems, said jaws being of curved formation -at their outer ends to conform to and partly embrace the external contour of the scaiold- -ing members located between said jaws and said disc` and two clamping bolts one to be passed freely through said hole .of one griping jaw and to be screwed into the borbe screwed into said stem on the opposite side of said disc to force said gripping jaws into pressure contact with said scaffolding members. i

3. A device for clamping `together tubular and other members of scaii'olding or framework structures; comprising a dise having two coaxial stems one proceeding from each face thereof, the base of each stem conjoining the face of the disc in curved formation with a radius corresponding to the cross section of the scaffolding members which are to be clamped, gripping jaws one to be applied to each stem, each gripping jaw to secure a single scaffolding inember, eachof said jaws extending laterally of said stems in one direction and having a curved formation at its inner face to overhang and partly embrace said scaffolding member to be clamped and extending beyond said stem at its opposite end and having an extension at Such end directed towards and contacting with the )face of said disc, and means coact-v ing between said .stems and said jaws to force said jaws t0 grip said scaffolding liembers between said Ajaws and said central 1sc. Y LA devicefor clamping together tubular and other lmembers of scaffolding or framework structures; comprising a disc having two Ycoaxial stems one proceeding from each face thereof, the base of each stem conjoining the face of the disc in curved formation with a radius corresponding to the cross section ofthe scaffolding members which, are to be clamped, grippingy jaws one to be appliedto each stem, said jaws extending laterally of said stems to overhang the`scaifolding members contacting with the curved bases of said stems and l0- cated between said gripping jaws and said disc, said jaws having their inner gripping aces, said flanges hav 'ing curved faces to conform and Contact with the scait'olding members to be clamped to provide foreach jaw two curved gripping edges to partly embrace said scaifolding members to be clamped, and means coacting betweenrsaid'stems and said jaws t0, forcesaid jaws to 'grip said scaffolding members between said jaws and said central i disc.

'.rom each face thereof, the base of each stem conjoiningthe face of the disc in curved formation wit -a radius correspondin to the cross section of the scaffolding mem rs which are to be clamped, grippingjavvs one to be applied to each stem, each gripping jaw to secure a single scaffolding member, each'of 'said jaws extending laterally of each of said stems in one'direction to overhang thel scaiolding memberand having a extending flanges on 5. A device for clamping together tubucurved lformation at its inner face to partly embrace said scaffolding member to be clamped and extending beyond said stem at its opposite end, an extension at the latter end of each jaw to Contact with the face of said dige, a series of teeth on the edge of Saud eXtenslon and an annular serles of teeth on the face of said dise with which said to force seid jaws to grip said sea'olding members between saidjaws and said central disc.

In Witnese whereof I my hand.

have hereunto set DANIEL PALMER-JON ES. 

